Vinyl phosphates,process for their preparation and pesticidal preparations containing them

ABSTRACT

THE PRESENT INVENTION RELATES TO NEW, BROAD-SPECTRUM PHOSPHATES, THEIR PROCESS FOR THE MANUFACTURE AND THEIR USE, EITHER PER SE OR IN PREPARATIONS IN THE CONTROL OF NEMATODES, INSECTS AND PESTS BELONGING TO THE ORDER OF ACARINA AT ALL STAGES OF DEVELOPMENT. THESE COMPOUNDS ARE ALSO EFFECTIVE AGAINST UNDESIRED PLANT GROWTH, BACTERIA AND FUNGI, AND ALSO AGAINST GASTROPODS. THEY ALSO HAVE A CHEMOSTERILIZING ACTION ON INSECTS.

United States Patent 3,705,904 VINYL PHOSPHATES, PROCFfiS FOR THEIR PREPARATION AND PESTICIDAL PREPARA- TIONS CONTAINING THEM Henry Martin and Josef Drabek, Basel, Switzerland, assignors to Ciba-Geigy AG No Drawing. Filed May 18, 1970, Ser. No. 38,570 Claims priority, application Switzerland, May 19, 1969, 7,679/ 69; July 22, 1969, 11,193/69 Int. Cl. C07d 27/08 US. Cl. 260-3265 A 2 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to new, broad-spectrum phosphates, their process for the manufacture and their use, either per se or in preparations in the control of nematodes, insects and pests belonging to the order of acarina at all stages of development. These compounds are also effective against undesired plant growth, bacteria and fungi, and also against gastropods. They also have a chemosterilizing action on insects.

O III-X-Rl in which R represents an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, R represents an alkyl group having 1 to 4 carbon atoms, X represents a CO-- or an --SO group and Y represents a hydrogen or a chlorine atom, R representing an alkyl group having 1 to 4 carbon atoms when Y is a hydrogen atom, and R represents an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms or a phenyl radical substituted by a halogen or an alkyl group having 1 to 4 carbon atoms, or a hydrogen atom when X is a CO group, and in which R, and R together with the symbols N and X, can also constitute a five-membered to seven-membered heterocycle containing at least one CO or S0 group, or in which, when Y is a chlorine atom, R represents an alkyl group having 1 to 4 carbon atoms or a phenyl radical that may be unsubstituted or substituted by a halogen or an alkyl group having 1 to 4 carbon atoms, and R provided R represents an alkyl group, represents a phenyl radical that may be unsubstituted or substituted by a halogen, an alkyl group having 1 to 4 carbon atoms and/or N0 whereas, on the other hand, R provided R represents a phenyl radical that may be substituted, represents an alkyl group having 1 to 4 carbon atoms, or a hydrogen atom when X is a CO group, or R and R together with the symbols N and X, can constitute a five-membered to seven-membered heterocycle containing at least two carbonyl groups or a heterocycle fused to a benzene nucleus or to a cyclohexyl ring.

The term alkyl group containing 1 to 4 carbon atoms as used herein refers primarily to methyl, ethyl or propyl 3,705,904 Patented Dec. 12, 1972 group, the term alkoxy group containing 1 to 4 carbon atoms" refers to methoxy, ethoxy or propoxy groups, and the term cycloalkyl group containing 3 to 6 carbon atoms refers, in particular, to cyclopropyl and cyclohexyl groups. The term halogen as used herein refers to fluorine, chlorine, bromine and iodine, but especially to chlorine or bromine.

An important group belonging to the series of compounds represented by Formula I are those corresponding to Formula II in which R' represents a methyl, ethyl, methoxy or ethoxy group, R' represents a methyl or ethyl group, X represents a C-O- or an SO group, but especially a -CO- group, R represents an alkyl group having 1 to 4 carbon atoms and R, represents an alkyl group having 1 to 4 carbon atoms, a cyclopropyl group or a phenyl radical substituted by a halogen atom or an alkyl group having 1 to 4 carbon atoms, or may represent a hydrogen atom when X is a CO--- group, or in which R, and R,, together with the symbols N and X, can form a fivemembered to seven-membered heterocycle containing at least one carbonyl group, with X representing -CO.

Another important group belonging to the series of compounds represented by Formula I are those corresponding to Formula III in (III) in which R; represents a methyl, ethyl, methoxy or ethoxy group, R represents a methyl or ethyl group, X represents a C0 or -S0g group, R represents an alkyl group having 1 to 4 carbon atoms or a phenyl radical that may be unsubstituted or substituted by a halogen atom or an alkyl group containing 1 to 4 carbon atoms, and R",, provided R is an alkyl group, represents a phenyl radical substituted by a chlorine atom, a methyl group and/or N0 whereas when R, is a phenyl radical that may be substituted, represents an alkyl group containing 1 to 4 carbon atoms, or is a hydrogen atom when X is a CO- group, or in which R and R" together with the substituent N and the substituent X constituting a CO- group, form a five-membered to seven-membered heterocycle containing at least two carbonyl groups or a heterocycle fused to a benzene nucleus.

An important sub-group of compounds belonging to the series represented by Formula 111 are those in which R; represents a methoxy or an ethoxy group.

The new compounds of Formula I can be used as pesticides together with one or more of the following additives: a carrier, a solvent, a diluent, a dispersing agent, an emulsifying agent, a thickening agent, an adhesive, a wetting agent and/or a fertilizer and, if necessary, a known pesticide or a bait.

The advantage of the new compounds, in addition to their broad-spectrum action in combating various plant and animal pests, is their stability towards alkalis, which makes them eminently suitable for use in cattle dips, for example, for the control of ectoparasites, for application in rice fields and, in general, for application in soil, for example, for the control of soil-dwelling insects, acarids and nematodes and for the control of certain bacteria, fungi and weeds.

The animal pests include, in particular, insects and members of the order acarina, for example, mites and ticks, including the different stages of metamorhposis, that is to say, eggs, larvae, nymphs and pupae.

The compounds of Formula I can be used, for example, against all harmful insects, for example, aphides, for example, the potato aphid (Myzus persicae) and the black 'bean aphid (Doralis fabae); shield lice, for example, Aspidz'otus hederae, Lecanz'um hesperidium and Pseudococcus maritimus; thysanoptera, for example, Herc-inothrips feroralis, and bugs, for example, the beet leaf bug (Piesma quadrant) and the bedbug (Cimex lectularius), butterfly larvae, for example, Plutella maculipennis and Lymantria dispar; beetles, for example, corn weevils (Sitophilus granarz'us) and Colorado beetles (Leptinotarsa decemlineara), and also the soil-dwelling larvae, for example, wire worms (Agriotes sp.) and cockchafer larvae (Melolontha melolontha); cockroaches, for example, the German cockroach (Blattella germanica); the cricket (Gryllus domestz'cus); termites, for example, Reticulitermes; hymenoptera, for example, ants; lepidoptera, for example,-.Chilo supprssalis; diptara, for example, the fru t fly Drosophilia melanogaster, the Mediterranean fruit fly Ceratitis capitata, the housefly (Musca domestica) and gnats, for example, Aedes aegypti and Anopheles stephensi.

The compounds of Formula I are also specially efficient at controlling members of the order acarina, for example, Eulaelaps, Echinolaelaps, Laelaps, Haemoganmasus, Dermanyssus, Ornithonyssus, Allodermanyssus, especially Allodermanyssussanguineus, Pneumonyssus, Amblyornma, Aponomma, Boophilus, Dermancentor, Haemophysalis, Hyalomma, Ixodes, Margaropus, Rhipicephalus, Ornithodirus; Otobius, Chelyletidae, for example, Cheyletus, Psorergates, Demodicidae, Trombiculidae, for example, Trombicula, Eutrombicula, Schiingastia, Acomatacnrus, Neoschongastia, Euschongastia, Sarcoptiformes, for example, Notoedres, Sarcoptes, Knemidokoptes, Psoroptidae, for example, Psoroptes, Choripotes, Octodectes or Tetranychidae, for example, T etranychus telarius; T etranychus urticae.

Nematodes that may be mentioned, particularly phytopathogenic nematodes, are those belonging to the following orders:

Aphelenchoides, for example, A phelench as ritzemabosi, Aphelenckus fragariae, Apkelenchus oryzae, Ditylenchoides, for example, Dizylenchus dipsaci, melidogynes, for example, Meloidogyne arenarz'a, Meloidogyne incognira, cyst-forming neatodes (heterodera), for example, Heterodera rostochiensis, Heterodera schachtii, and also root nematodes, for example, Paratylenchus, Rotylenchus, Xiphinema and Rhadopholus.

Pesticidal preparations, generally containing 0.1 to 95 percent by weight, preferably 1 to 85 percent by weight, of the new compounds of Formula I (or Formula II or III) can be made up in a wide variety of forms, for example, in the form of dry moist preparations or as liquids or solids. Shaped carriers such as fiy-dishes, flypapers, paper strips or granules can be impregnated with the active principles. The active principles can also be transformed into a gas phase by means of sprays.

However, they can also be used in almost pure form without additives when applied from spraying devices producing a fine enough spray. The main means of application of this kind would be spraying from aircraft.

The solvents used in the preparation of solutions of compounds of Formula I that can be used directly as sprays are, for example, mineral oil fractions having a high to medium boiling range, for example, Diesel oil or kerosene, coal-tar oil and oils of vegetable or animal origin, as well as hydrocarbons, for example, alkylated napthalenes, tetrahydronaphthalene, if necessary, in conjunction with xylene mixtures, cyclohexanols and ketones, and also chlorinated hydrocarbons, for example, trichloroetha e, t ichlcwethy c e or triand t t a-chlqmhenzcnes- 4 It is advantageous to use organic solvents having a boiling point above C.

The aqueous preparations are advantageously prepared by the addition of water to emulsion concentrates, pastes or wettable powders. Suitable emulsifying or dispersing agents are non-ionic products, for example, condensation products of aliphatic alcohols, amines or carboxylic acids having a long-chain hydrocarbon radical containing about 10 to 20 carbon atoms and ethylene oxide, for example, the condensation product of octadecyl alcohol and 25 to 39 mols of ethylene oxide, or the condensation product of commercial oleylamine and 15 mols of ethylene oxide or the condensation product of dodecylmercaptan and 12 mols of ethylene oxide. The following are examples of suitable anionic emulsifying agents: the sodium salt of dodecyl alcohol sulphuric acid ester, the sodium salt of dodecylbenzenesulphonic acid, the potassium or triethanolamine salt of oleic acid or abietic acid or mixtures of these acids, or the sodium salt of a petroleum sulphonic acid. Suitable cationic dispersing agents are quaternary ammonium compounds, for example, cetylpyridinium bromide or dihydroxyethylbenzyldodecylammonium chloride.

Dusting and strewing preparations can be prepared by using solid carriers, for example, talcum, kaolin, bentonite, calcium carbonate, calcium phosphate, and also charcoal, cork meal, wood flour and other materials of vegetable origin. It is also highly advantageous to make preparations in granular form. The preparations in their various forms can also be provided with substances that improve dispersion, adhesion, rain-resistance and penetration; substances of this kind are, for example, fatty acids, resins, glues, casein or alginates.

The compounds of the invention can be used either alone or together with known pesticides, especially insecticides, acaricides, nematicides, bactericides, fungicides, and so forth.

The action of the phosphorus compounds of the invention can be enhanced by synergists. Suitable substances are, for example, sesamin, sesamex, piperonyl cyclonenes, piperonyl butoxide, piperonal -bis[2 (Z-butoxyethoxy) ethyHacetate. sulphoxides, propyl isomers, N-(Z-ethylhexyl) 5 norbornene 2,3 dicarboxamide, octachlorodipropylether, Z-nitrophenylpropargylether, 4-chloro-2- nitrophenylpropargylether and 2,4,5-trichlorophenylpropargylether.

Known insecticides, acaricides or nematicides can be added to broaden the spectrum of action ofthe compounds of the invention.

The following are given as examples:

Phosphoric acid derivatives bis-0,0-diethylphosphoric acid anhydride (TEPP) 0,0,0,0-tetrapropyldithiopyrophosphate dimethyl(2,2,2-trichloro-l-hydroxyethyl)phosphonate (Trichrorfon) 1,2-dibromo-2,Z-dichloroethyldimethylphosphate (Naled) 2,2-dichlorovinyldimethylphosphate (Dichlorfos) Z-methoxycarbamyL1-methylvinyldimethylphosphate (Mevinphos) dimethyl-l-methyl-Z-(methylcarbamoyl)vinylphosphate cis (Monocrotophos) 3-(dimethoxyphosphinyloxy)-N-methyl-N-methoxy-ciscrotonamide 3-(dimethoxyphosphinyloxy)-N,N-dimethyl-ciscrotonamide (Dicrotophos) 2-chloro-2-diethylcarbamoyl-l-methylvinyldimethylphosphate (Phosphamidon) 0,0-diethyl-O (or S -2- (ethylthio -ethylthiophosphate (Demeton) S-ethylthioethyl-0,0-dimethyl-dithiophosphate (Thiometon) 0,0-diethyl-S-ethylmercaptomethyldithigphosphate (Phorate) 2-( l-methylheptyl) -4,6-dinitrophenyl-crotonate [dinocap] 2-sec.butyl-4,6-dinitrophenyl-3-methylbutenoate [binapacryl] 2-sec.butyl-4,6-dinitrophenyl-cyclopropionate 2-sec.butyl-4,6-dinitrophenylisopropylcarbonate [dinobuton] Various sabadilla rotenone cevadine veratridine ryania pyrethrin 3-allyl-2-methyl-4-oxo-2-cyclopenten-l-yl-chrysanthemumate (allethrin) 6-ch1oropiperonyl-chrysanthemumate (barthrin) 2,4-dimethylbenzyl-chrysanthemumate (dimethrin) 2,3,4,S-tetrahydrophthalimidomethylchrysanthemumate (S-benzyl-S-furyl)-methyl-2,2-dimethyl-3-(Z-methylpropanyl) cyclopropanecarboxylate nicotine Bacillus thuringiensis Berliner dicyclohexylcarbodiimide diphenyldiimide [azobenzene] 4-chlorobenzy1-4-chlorophenylsulphide [chlorobenside] creosote oil 6-methyl-2-oxo-1,3-dithiolo- [4,S-b1-quinoxa1ine (quinomethionate) (I)-3-(2-furfuryl)-2-methyl-4-oxocyclopent-2-enyl(I)- cis-trans) chrysanthemum-monocarboxylate [furethrin] 2-pivaloyl-indane-1,3-dione [piudon] 2-fluoroethy1 (4-bisphenyl) acetate 2-fluoro-N-methyl-N 1-naphthyl)-acetamide pentachlorophenol and salts 2,2,2-trichloro-N-(pentachlorophenyl)-acetimidoyl chloride N'-(4-chloro-2-methy1pheny1)-N,N-dimethy1formamidine (chlorophenamidine) 4-chlorobenzyl-4-fiuorophenyl sulphide (fluorbenside) 5,6-dichloro-1-phenoxycarbanyl-2-trifluorornethylbenzimidazole (fenozaflor) tricyclohexyl tin hydroxide 2-thiocyanatoethyllauric acid ester 8-butoxy-}8'-thiocyanatodiethylether isobornylthiocyanato acetate para-chlorophenyl-para-chlorobenzenesulphonate (ovex) 2,4-dichlorophenylbenzenesulphonate para-chlorophenylbenzenesulphonate (fenson) para-chlorophenyl-2,4,S-trichlorophenylsulphone (tetradifon) para-chlorophenyl-2,4,S-trichlorophenylsulphide (tetrasul) methylbromide para-chlorophenylphenylsulphone para-chlorobenzyl-para-chlorophenylsulphide (chlorobenside) 4-chlorophenyl-2,4,5-trichlorophenylazosulphide 2-(para-tert.-butylphenoxy)-l-methylethyl-Z-chloroethyl sulphite 2- (para-tert.-butylphenoxy) cyclohexyl-2-propionyl sulphite 4,4'-dichloro-N-methylbenzenesulphoneanilide N-(Z-fiuoro-1,1,2,2-tetrachloroethylthio)-methanesulphoneanilide 2-thio-1,3-dithiolo-(4,5,6)-quinoxaline (thioquinox) chloromethyl-para-chlorophenylsulphone (lauseto new) 1,3,6,8-tetranitrocarbazole prop-Z-ynyl-(4-t-butylphenoxy)-cyclohexyl sulphite (propargyl) The new compounds of Formula I are prepared by a process similar to the Michaelis-Arbuzov reaction by reacting a compound of trivalent phosphorus of the formula R1-P0R2 in which R and R have the meanings ascribed to them in Formula I, with a trichloroacetamide of the formula with elimination of Rz-Cl, when Y in Formula I stands for C1, or with a dichloroacetamide of the formula with elimination of R Cl, when Y in Formula I stands for H, R X and R having the meanings ascribed to them in Formula I.

The reaction is preferably carried out in a solvent that is inert to the reactants, for example, benzene, xylene, toluene, dioxane or cymene.

EXAMPLE 1 Preparation of starting products-N-trichloroacetyl-N- acetanilide 72.7 grams of trichloroacetyl chloride were added dropwise within 30 minutes at 15 to 20 C. to a mixture of 54.1 grams (0.4 mol) of acetanilide+300 mols of toluene+40.5 grams of triethylamine, while stirring well. The reaction mixture was then stirred for 2 hours at room temperature. Triethylaminohydrochloride was removed by vacuum filtration and the solvent was distilled from the filtrate. 108 grams (96% of the theoretical yield). The residue was recrystallized from hexane. Yellowish crystals melting at 64 C.

Calcd. for C H Cl NO (percent): CI, 37.9; N, 5.0. Found (percent): Cl, 36.5; N, 5.1.

The following compounds were produced by the same method:

/C OCH: Oil not capable of distillation.

l C 0001a 01 /C O OH:

O O 0 C13 01 MP. C.

l C O 0 C13 01 CHzCQ M.P. 91 C. l /NC 0 0 C13 CHz-C 0 /CH3 M-P. 101 C.

O O O Ola CH M.P. 86 C.

| C O C 013 C1 1 1 EXAMPLE 2 Preparation of dichlorovinylphosphates of Formula I.

0,0-dimethyl 1 (N-methyl-N-benzoylamino)-2,2-dichlorovinylphosphate [Compound No. 1]

68.9 grams of N-methyl-N-trichloroacetylbenzamide were dissolved in 150 m1. of toluene. 31 grams of trimethylphosphite were added dropwise to this solution within 20 minutes. The temperature rose from 25 C. to 60 C.

No. Active principle M.P. 50 C.

N-CH:

legs

3 (C1H O)zPOC=C Cl,

Liquid that cannot be distilled; my 1.5116.-

0 CCHa 4 (CzH50)z]P-O-C=C0lg Liquid that cannot be distilled; no 1.5190.

N-CHa Highly viscous oil; no 1.5440.

lo@ m 6 (o2H50h P-0-o=c 01, Highly viscous oil.

0 liq-0H3 TABLE-Continued Active principle 2 s )2]f0 Oil that cannot be distilled.

Oil; m) 1.4833.

l Cl

Oil; 119 1.5260.

Oil; m) 1.5131.

Oil; 110 1.5350.

M.P. 53 C.

TABLE-Continued No. Active principle Viscous oil.

EXAMPLE 3 Preparation of ith aCzO)2( ;OC=OHCl -1\|I CO.

NCOCHs Ha [Compound No. 43] c 0 55.2 grams of dichloroacetic acid-N-methyl-N-acetylamide are mixed with 49.8 grams of triethylphosphite in gomp, R I R, P 100 ml. of toluene and the batch is stirred for 20 hours at a a party 100 to 110 C. Unreacted starting products are removed 1 by distillation together with the solvent. The residue is 72 2 5 2 0 2 C-I mm. Hg. purified by molecular distillatlon. 62.1 grams of the yellow end product are obtained; B.P. 88 C./0.01 mm. Hg. OHrOHZ Analysis for C H ClNO P: Calculated (percent): P, 10.8; N, 4.9. Found (percent): P, 10.8; N, 4.8. CZHEO CZHB CO CH1 Viscous The following compounds of Formula II can be pre- 0Hz pared in the same manner: OHPCHI 1 74 onto CH0 ooon, 13.1. 00 040.02 R'zOfiO('3=CHCl N I mm. Hg.

0 N-C 0-R4 GHQ-CH2 R3 (II) R; R3 B; Property CH3 CH3 CH3 B.P. 86 040.02 mm. Hg. 02m- CH3 CH B.P. 88 040.01 mm. Hg. CsH7 CH3 CH: 011. CH3 CH3 CH3 O11. (32H: CH2 CH3 Oil. CH3 CzHs CH3 ViSCOHS 011. CzHs C2H5 CH3 CH3 CH3 02H} Reddish Oil. CzHs CH3 CzH5 Oil.

CH3 CH3 CH: 011;

52 0111 0 CaHs CH3 /CH2 13.1. 100 C./0.001m.m.Hg.

53 CH; CH; CH; CH: Viscous 011.-

54 CaHa CaHs CH5 CH2 DO.

CH3 CH3 'C6H5 O11. C2115 CH3 -Cs 4Cl(D) Oil. CH3 OH; H 85 C./0.05 mm. Hg. C2H5 OH; H C./0.05 mm. Hg. @2115 OH; H O l. 0H: OH; H 011. CH3 C2115 H Viscous 011. Cz s C2115 H 011. 0,115 01H H Reddish yellow oil. CH; 6 H H Oil. C3H5 C1115 H Viscous oil. (J2EE Cyclopropyl H Do. 2 0 a 5 H O l. C H CQH401(D) H 01 1. C1115 0 5 CH3 011. I CH5 C H Cl(p) CH; Yellow 011.

C1H5 CH1 CH1 BIOWD Oil.

19 20 TABLEC011fi11I1efi dishes and covered with the top halves of the dishes. Each dish contained 10 flies. After 1 hour, the degree of kill was accessed in respect of all concentrations. Results in Comp 4 percent: No. R R: B; Property 5 Cemtitis Capitata, percent of kill 75 011 0 CH3 CO-GH: Viscous oil.

Compound 52 57 58 42 43 72 74 0 n m tion 0 C6 ra Gil -CH, p.p.m.:

10 100 100 100 100 100 100 100 76 02H; C=H5 (JO-CH2 Do. 100 100 100 100 100 100 100 100 100 100 100 100 100 100 -N 100 100 100 100 100 100 100 40 100 100 so 100 so 100 cHi-c fi o 100 100 50 50 50 50 The followmgN-sulphonated compounds of Formula EXAMPLE 6 IV are prepared m an analogous manner:

Contact action on Apis fabae r, p v Method: Young Vicia faba plants having a height of II about 6 cm. are infested with parts of plants attacked by i 2 Aphis fabae. The conditions are right for the tests after R3 the plants have grown for a further 5 days and the aphid R3 Property population has increased accordingly. To test the contact action, the plants are sprayed from all sides with diiterent CH3 CH; 011. (323, 1ow on. concentrations of the active principles, the maximum con- 0 H CH 0. Cimcuw on centration bemg 800 ppm. The sprayer used rs the kind EXAMPLE 4.FORMULATIONS Dusting preparations Equal parts of one of the active principles of the invention and precipitated silica are finely ground. Dusting preparations, preferably having an active principle content of 1 to 6%, can be prepared therefrom by admixture with kaolin or talcum.

Wettable powder To prepare a wettable powder, the following components, for example, are mixed and then finely ground:

50 parts of an active principle of the invention 20 parts of highly adsorptive silica 25 parts of Bolus alba (kaolin) 3.5 parts of sodium l-benzyl-2-stearylbenzimidazole-6,3'-

disulphonate Emulsion concentrate An emulsion concentrate can be prepared in the following manner, using active principles having good solubility:

A mixture is prepared from 20 parts of active principle 10 parts of xylene 10 parts of a mixture consisting of a reaction product derived from an alkylphenol and ethylene oxide and calcium dodecylbenzenesulphonate An emulsion spray can be prepared by diluting the mixture to the required concentration with water.

Granulates Contact action on Ceratitis capitata A series of solutions were prepared by dissolving substances 42, 43, 52, 57, 58, 72 and 74 in acetone. Six solutions were prepared 01'' each substance, the strengths being 1,000, 100, 10, 5, 2.5 and 1.25 ppm. of active principle respectively. The bottom halves of Petri dishes were treated with 10 ml. each of the solutions. After the solvent had evaporated, supercooled flies were placed in the Petri employed in chromatography. The action is assessed after 2 days.

The percentage of mortality in respect of the various compounds is as follows:

Action on larvae of Epil'achna varivestis Method: Young Phaseolus plants are immersed in aqueous solutions of the active principles, the concentrations being 100, 400, 200 and 100 ppm. respectively. The plants are allowed to dry and then each one is infested with 5 larvae of Epilachna varivesfis at L4 stage. Each plant is covered with a plastic bag.

The percentage kill in respect of the various compounds is assessed after 5 days.

Percent of kill Compound 42 27 4.3 30 58 74 52 Concentration p.p.m.:

EXAMPLE 8 Effect on Tetranychus urticae Method: Phaseous plants at the two-leaf stage are infested with Tetranychus urticae by contact with pieces of leaves attacked therewith, infestation being eflfected 12 hours prior to treatment. After 12 hours, a population comprising all stages is present on the plants. The active principles in the form of a wettable powder are sprayed onto the plants by means of a fine sprayer in a manner such that an even coating of droplets is formed on the surfaces of the leaves.

The active principles are applied in a concentration of 800 ppm. and the mortality in respect of all stages of development is assessed after 2 days and 7 days. In cases were a kill is achieved after 2 days, the plant is re-infested.

Effect on ectoparasites and vectors (a) Rhipicephalus bursa: The tests are carried out with hungry adult ticks. Five ticks are introduced into each of the test-tubes and immersed for 1 to 2 minutes in 2 ml. of an aqueous emulsion containing 100 p.p.rn. of the substance under test. Each tube is closed with a standardized plug of cotton wool and then inverted to allow the plug to absorb the active-principle emulsion. Assessment is made after 2 weeks.

A similar test is carried out with Rhipicephalus larvae.

(b) Boophilus microplus (larvae): About 10 to 20 larvae are treated as per Test (a) with dilutions of an active principle. Assessment is made after 2 weeks.

(c) Lucilia sericata (larvae): A dilution series is pre- The concentrations giving a 100% kill are expressed in mg. AS/dish.

The results of Tests (a) to (e) shown in the following table refer to the lowest concentrations giving a 100% kill.

TABLE LOioo in p.p.m. or in mg. AS/dish R. bursa B. mi- L. seri- A. aeaypti croplus cata Comp. No. Adult Larvae larvae larvae Larvae Adult Nora. =not tested.

EXAMPLE 10.EFFECT ON PESIS HARMFUL TO STORED PRODUCTS Minimum amount of active substance in 151g. per m. of a dusting formulation for 100% kill after 24 ours exposure Atte- Acheta Phyllo Perigenus domesdromia planeta Blatta Tenebrio molitor Dermestesfrischii piceus ticus Sitagermameriorie'n- L-5- L-5- philus Comp. N0. am'ca ctma talis Imago Larva Imago Larva larva larva granarius pared from an emulsion concentrate of an active principle. 2 millilitres each of the concentrations are mixed with 2 grams of minced horsemeat in 10 ml. glass vessels. 20 to 30 of freshly hatched larvae are then introduced into each of the glass vessels. Assessment is made after 24 hours.

1) Ades aegypti (larvae): L-l-larvae of the yellow fever mosquito are kept for 24 hours in 10 ml. each of different concentrations of an emulsifiable active-principle formulation. Assessment is then made.

(e) Ades aegypti Adult mosquitoes are exposed for 6 hours to a coating of spray formed by a solution of an active compound in acetone. The effect is then assessed.

We claim: 1. A compound corresponding to the formula 2. A compound corresponding to the formula 2 5 )2POC=CHCl till References Cited UNITED STATES PATENTS 5/1965 Schuler et a1. 260326.5 A X NICHOLAS S. RIZZO, Primary Examiner I. A. NARCAVAGE, Assistant Examiner 

